A study explores the accuracy of five wearable heart rate trackers that use optical sensors.
How accurate are the latest wearable heart rate trackers?
That’s an important question amid the flourishing demand for wearable fitness devices and wrist-worn heart rate monitors. Approximately 1 in 6 consumers in the U.S. uses some type of wearable technology, such as a fitness band or a smartwatch (Piwek et al. 2016). Industry research from 5 years ago predicted sales of 110 million wearable devices by 2018, but shipments of 115.4 million in 2017 have already outpaced that projection (Piwek et al. 2016; IDC 2018).